What are other gardeners reading?

I wonder what other gardeners and landscape designers are reading, not just for inspiration, but to gain historical perspective, or, perhaps to fall asleep?  I have shelves of books about gardens, many that I've read cover-to-cover more than once, others that no longer have a spine (not unlike my old Bible), and some very pretty ones that don't do much more than collect dust.

A few weeks from now, I'm thrilled to attend a book signing party for David Culp, and his new book The Layered Garden:  Design Lessons for Year-Round Beauty from Brandywine Cottage.  Of course, this is on my list of books to read and add to my collection - and one that will likely lose its spine.  I've heard David Culp speak about winter gardens and read articles he's written about plants and plant design.  His excitement for plants, particularly perennials, is contagious.  

Peeking into the book online, he includes a list of some of his favorite garden books . . . what a rare treat! I have quite a few on his list, but now have a few more to add to my library.